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XRT4500CV Datasheet(PDF) 1 Page - Exar Corporation |
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XRT4500CV Datasheet(HTML) 1 Page - Exar Corporation |
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1 / 99 page  Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510) 668-7000 • FAX (510) 668-7017 • www.exar.com áç áç áç áç XRT4500 MULTIPROTOCOL SERIAL NETWORK INTERFACE IC SEPTEMBER 2002 REV. 1.0.7 GENERAL DESCRIPTION The XRT4500 is a fully integrated multiprotocol serial interface. It supports all of the popular serial commu- nication interface standards such as ITU-T V.35, ITU- T V.36, EIA530A, RS232 (ITU-T V.28), ITU-T X.21 and RS449. It can easily be interfaced with most common types of Serial Communications Controllers (SCCs). This device contains eight receivers and eight transmitters, in groups of six or seven. It is a complete solution containing all of the required source and load termination resistors in one 80-pin TQFP package. The XRT4500 operates at higher speeds (20MHz for V.35 and 256kbps for V.28). The XRT4500 can be configured to operate in one of the seven interface standards in either DTE, or DCE modes of operation and power down mode. It fully supports echoed clock as well as clock and data in- version. Loopbacks are supported in DTE and DCE modes of operation. This feature eliminates the need for external circuitry for loopback implementation. Control signals such as RI, RL, DCD, DTR, DSR are protected against glitches by internal filters. These fil- ters can be turned off. The XRT4500 provides an in- ternal oscillator (clock signal) which can be used to conduct standalone diagnostics of DTE equipment. BLOCK DIAGRAM FEATURES • Pin Programmable Multiprotocol Serial Interface • V.35, V.36, EIA-530 A, RS232 (V.28), V.10, V.11, X.21 and RS449 Communication Interface Standards • V.28, V.10, V.11 and V.35 Electrical Interfaces are ‘CTR2’ Compliant • Contains On-Chip Source and Load Termination Resistors • Contains Eight Receivers and Eight Transmitters with Switchable DTE and DCE Modes • Glitch Filters on the Control Signals (Selectable) • +5V Single Power Supply with internal DC-DC Converter • Full Support of Loopbacks, Data & Clock Inversion, and Echoed Clock in DTE and DCE Modes • Full Support of Most Popular Types of HDLC Control- lers (Single, Double, and Triple Clocks supported) • High-speed V.28 Driver: 256KHz • Internal Oscillator for Standalone DTE Loopback Testing • Control Signals Can Be Registered and Non-regis- tered • Control Signals Can Be Tri-stated for Bus-based Designs • “Cable Safe” Operation Supported • ESD Protection Over ± 1KV Range • TTL Level Digital Inputs • TTL/CMOS Digital Outputs APPLICATIONS • Data Service Units (DSU) • Channel Service Units (CSU) • Routers • Bridges • Access Equipment TX2 TX1 RX3 RX2 RX1 TX4 TX3 RX4 RX5 TX5 TX6 RX6 TX7 RX8 RX7 V.10, V.11, V.35, V.28 Electrical Interfaces Signals TXD, RXD High Speed Data and Clock V.10, V.11, V.35, V.28 V.10, V.11, V.35, V.28 SCTE Signals: DCE Transmitter, DTE Receiver RTS, CTS DTR, DSR LL, RL, RI (TM) LL, RL, RI (TM) Mode and Configuration Control Switching Regulator DC-DC Converter V.10, V.11, ---- , V.28 V.10, V.11, ---- , V.28 V.10, V.11, ---- , V.28 V.10, ---- , ---- , V.28 V.10, ---- , ---- , V.28 High Speed Transceiver TXC, RXC High Speed Data and Clock DCD Signals: DCE Transmitter, DTE Receiver Diagnostic Transceivers TX8 Handshaking/Control Transceivers |
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